I don't even want to do it for myself. I definitely don't want to do if for someone else.
I don't even want to do it for myself. I definitely don't want to do if for someone else.
「自分のために～をする」はdo ~ for myselfです。
evenが無くても意味は通じますが、evenを入れることで「～でも」「～でさえ」というニュアンスが入ります。
Definitely は「絶対」という意味です。
I wouldn't want to give birth to my own baby, so I definitely wouldn't want to be a surrogate mother and give birth to someone else's baby.
この場合、次のような言い方ができますよ。
ーI wouldn't want to give birth to my own baby, so I definitely wouldn't want to be a surrogate mother and give birth to someone else's baby.
「自分の子でも産みたくないのに、代理母になって、誰か他の人の子を産むなんて絶対嫌だ」
surrogate mother「代理母」
ご参考まで！
アメリカ合衆国 
カナダ 
